sql group_concat和子查询 [英] sql group_concat and subquery

问题描述

我有2个mysql表:

I have 2 mysql tables:

 car_model:
    id (int) (Primary Key)
    title (varchar)
    id_brand (int) FK to car_brand table



 car__car_model: - relation many to many
     id_model (int) 
     id_advice_model (int)

在car__car_model中，有以下数据:

In car__car_model there are the following data:

(id_model)  (id_advice_model)
12          12
12          45
12          67
12          78
13          13
13          12
13          67
13          105

我想这样获取此数据:

12    12,45,67,78
13    13.12.67,105

我使用group_concat并按如下方式分组:

I use group_concat and group by like this:

SELECT ccm.id_model,group_concat(ccm.id_advice_model) FROM car__car_model as ccm  group by ccm.id_model

问题: 如果是id，如何从car_model表中获取该字符串的标题-例如12,45,67,78.我想在1个查询中执行此操作-自定义我的查询

Question: How can fetch titles from car_model table for this string if ids - for example for 12,45,67,78. And I want to do it in 1 query - to customize my query

已更新: 现在我有另一个问题: 我还有一张桌子:

Updated: And Now I have another question: I Have one more table:

 car_brand:
    id (int) (PK)
    title (varchar)

在我的car_model表中，有一个字段 id_brand

and in my car_model table there is a field id_brand

问题2: 我如何从car_model中获取带有car_brand标题的标题表格-像这样-福特福克斯，菲亚特Linea等-现在，我可以(在您的帮助下)仅从car_model中获取标题 现在我有:12-Focus，Linea

Question 2: How can i fetch title form car_brand with the title from car_model - like this - Ford Focus, Fiat Linea and so on - Now I get (with you help) to fetch only title from car_model Now I have: 12 - Focus,Linea

已更新: 我使用-

SELECT 
id_model,group_concat(concat(cb.title,' ',cm.title))
FROM 
car__car_model as ccm  
inner join car_model cm on (cm.id = ccm.id_advice_model) 
inner join car_brand cb on (cb.id=cm.id_brand)
group by ccm.id_model

推荐答案

尝试一下::

SELECT 
ccm.id_model,group_concat(cm.tile, SEPARATOR ',') 
FROM 
car__car_model as ccm  
inner join car_model cm on (cm.id = ccm.id_advice_model) 
group by ccm.id_model

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